DOI: 10.1161/jaha.125.046718 ISSN: 2047-9980

Direct Comparison of the 0/1h‐ and 0/2h‐Algorithms in Patients With Prior Coronary Artery Bypass Grafting

Luca Koechlin, Jasper Boeddinghaus, Pedro Lopez‐Ayala, Gordon Jacobsen, James McCord, Bent Heimbach, Thomas Nestelberger, Karin Wildi, Emel Kaplan, Danielle M. Gualandro, Gabrielle Hure, Òscar Miró, Michael Christ, F. J. Martin‐Sanchez, Héctor Rodriguez Cetina Biefer, Omer Dzemali, Felix Mahfoud, Christian Mueller, Ivo Strebel, Paolo Bima, Desiree Wussler, Maria Rubini Gimenez, Jude Formambuh, Tobias Zimmermann, Christian Puelacher, Jeanne du Fay de Lavallaz, Luca Crisanti, Carlos Spagnuolo, Jonas Glaeser, Julia Reinhardt, Kathrin Meissner, Lourdes Herraiz Recuenco, Beatriz López, Gemma Martinez‐Nadal, Esther Rodriguez Adrada, Arnold von Eckardstein, Beata Morawiec, Damian Kawecki, Piotr Muzyk, Jiri Parenica, Nicolas Geigy, Eliška Potluková, Stephan Steuer, Angelika Hammerer‐Lercher, Dagmar I. Keller, Ksenija Slankamenac, Katharina Rentsch, MD Andreas Buser
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Background

The European Society of Cardiology (ESC) 0/1h‐high‐sensitivity cardiac troponin (hs‐cTn)T/I‐algorithms have lower efficacy in patients with prior coronary artery bypass grafting. We hypothesized that in these high‐risk patients, the longer time to the second blood draw within the ESC 0/2h‐hs‐cTn‐algorithms would increase efficacy, defined as the proportion of patients triaged to rule‐in/out of myocardial infarction, versus the ESC‐0/1h‐hs‐cTn‐algorithms.

Methods

In a prospective international multicenter diagnostic study including patients presenting to the emergency department with acute chest discomfort, final diagnoses were centrally adjudicated according to the Universal Definition of Myocardial Infarction. Safety and efficacy of the guideline‐recommended ESC 0/1h‐ and 0/2h‐hs‐cTn‐algorithms using assay‐specific use‐optimized cut‐offs were directly compared in patients with prior coronary artery bypass grafting. Findings were externally validated in an independent prospective US multicenter study.

Results

Among 356 patients (median [interquartile range] age 73 [64–80] years, prevalence of non–ST‐segment–elevation myocardial infarction [NSTEMI]: 31% [n=112]), sensitivity for rule‐out of NSTEMI was high for the ESC 0/1h‐ and 0/2h‐hs‐cTnT‐Elecsys‐algorithms (0/1h: 100% [95% CI 96.7–100]; 0/2h: Sensitivity: 99.1% [95% CI 95.1–99.8]). Specificity for rule‐in of NSTEMI was also high (0/1h: 97.1% [95% CI 94.2–98.6]; 0/2h 98.4% [95% CI 95.9–99.4]). Efficacy was 50.6% for 0/1h and 58.4% for 0/2h (difference: 7.9% [95% CI 4.2–11.5]). Findings with higher efficacy for 0/2h versus 0/1h were confirmed using hs‐cTnI‐Architect (difference in efficacy 3.1% [95% CI 0.1–6.1]) and using hs‐cTnI‐Atellica in the external validation cohort (n=178; difference in efficacy 9% [95% CI 4.5–13.5]).

Conclusions

The ESC 0/2h‐hs‐cTn‐algorithms have higher efficacy and comparable safety versus the ESC 0/1h‐hs‐cTn‐algorithms in patients with prior coronary artery bypass grafting.

Registration

URL: https://www.clinicaltrials.gov ; Unique Identifier: NCT00470587.

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